Surface treating apparatus for upright wall surfaces



May 8, 1956 s. P. CHAPPEN SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filed Sept. 25, 1952 7 Sheets-Sheet 1 R 4 m A W 7 5 ATTORNEY May 8, 1956 s. P. CHAPPEN SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filed Sept. 23, 1952 7 Sheets-Sheet 2 ATTORNEY y 3, 1956 s. P. CHAPPEN 2,744,494

SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filid Sept. 23, 1952 7 Sheets-Sheet 3 INVENTOR STE/245M CHAPPEA/ ATTORNEY May 8, 1956 s. P. CHAPPEN 2,744,494

SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filed Sept. 25, 1952 7 Sheets-Sheet 4 caA/awr /04 wwse/ms INVENTOR SrsP/IEA/ P. (Hana-M ATTORNEY May 8, 1956 s. P. CHAPPEN SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filed Sept. 25, 1952 7 Sheets-Sheet 5 1 arspx/a/ 2 (x/41 5 BY w ATTORNEY May 8, 1956 s. P. CHAPPEN SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filed Sept. 25, 1952 7 Sheets-Sheet 6 W U 4 m E INVENTOR ATTORNEY IIIl'III 7 Sheets-Sheet '7 IN V EN TOR.

A TTORNEV May 8, 1956 s. P. CHAPPEN SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Filed Sept. 23, 1952 rzmin/ 0/42 lND/NG DRUM United States Patent SURFACE TREATING APPARATUS FOR UPRIGHT WALL SURFACES Stephen P. Chappen, Carbondale, Pa. Application September 23, 1952, Serial No. 311,131

23 Claims. (Cl. 118-305) My invention relates to an apparatus for painting, sand blasting, steam or other fluid cleaning, or the like, and more particularly to an apparatus for performing these and similar surface treating operationson the upright wall surfaces of ships, buildings, tanks, silos, and the like.

One of the objects of my invention is to provide an improved apparatus for automatically lowering and lifting a device for applying treating material to a strip or band of an upright wall surface, such applying device being operative during the lowering thereof and being inoperative during thelifting thereof.

Another of the objects of my invention is to provide an apparatus for performing the aforementioned surface treating operations involving the use of a gaseous fluid either as the treating material itself, or a carrier for such material. In such apparatus a common supply of the fluid is utilized not only in connection with the surface treatment operation per se, but also in the operation and control of a movable support for the device for applying the treating material, such as in a reversible fluid motor for lowering and lifting such support. In one form of the invention I provide fluid pressure actuated controls for such motor.

An additional object of the invention is to provide an apparatus for performing the aforementioned surface treating operations which may be used in tanks, ship compartments, and the like, wherein explosive mixtures of gas and air may be present, without the attendant danger of a spark or the like igniting such explosive mixtures, as would be the case if an electric motor, for example, were used. 7

A further object of the invention is to utilize the exhaust from the fluid motor to prevent paint, sand, and other treating materials deleterious to the operation of the apparatus, particularly relatively movable parts thereof, from depositing on the apparatus and thus interfering with the operation thereof.

Another object of the invention is to provide means for dividing the common fluid supply between the device for applying the treating material to a surface and the motor for raising and lowering the support for such device, whereby only a fraction of the fluid in the common fluid supply is supplied to the motor While said support is being lowered, and the entire common fluid supply is supplied to the motor while said support is being lifted.

A still further object of the invention is to enclose the Working parts of the apparatus in such manner as to protect the same from the treating materials.

An object of the invention is to provide a cover means to prevent the spray from contacting surfaces which are not to be treated and to prevent the spray'from spreading, especially on misty days.

An auxiliary object is to form said cover means of hinged parts so that the same may be collapsed, thus rendering transportationless difficult.

A specific object is to mount the entire apparatus in definitely spaced relationship to the surface being treated.

A broad object is to provide a single cable suspension means as well as a double cable mounting and to suspend the apparatus from a trolley in order to move the apparatus with ease once a vertical reach of asurface has been treated from top to bottom.

Other and further objects of the invention will become apparent as the description proceeds, reference being made to the accompanying drawings forming a part of the present disclosure, wherein;

Fig. 1 is a perspective view of an apparatus constructed in accordance with the teaching of my'invention, illustrating how it would be used in the treatment of a vertical wall of a building or the like, the fluid conduits being more or less diagrammatically illustrated;

Fig. 2 is a side elevational diagrammatic view illustrating the apparatus as it might be used in the treatment of the hull of a ship;

Fig. 3 is an enlarged front elevational view of the apparatus, parts being omitted and parts being shown in section;

Fig. 4 is an enlarged sectional view taken on the line 44 of Fig. '3;

Fig. 5 is a sectional view taken on 5-5 of Fig. 3; Y 1

Fig. 6 is an enlarged fragmentary sectional .view taken on the line 66 of Fig; 7 illustrating the preferred form of valve used in the conduit supplying fluid to the motor when the device for applying the treating material is being lowered; v

Fig. 7 is a transverse sectional view taken on the line '77 of Fig. 6; V

Fig. 8 is a diagrammatic view illustrating the fluid circuit utilized in the operation of my apparatus, parts being shown in section; V I

Fig. 9 is a sectional view of one of the three way pilot valves taken on the line 99 of Fig. 8; v

Fig. 10 is a perspective view similar to-Fig. 1 showing the spray enclosing means; 7 I

Fig. 11 is a plan View, taken from above, of Fig. 10;

Fig. 12 is a vertical section taken on line 1212 of Fig. 11;

Fig. 13 is a vertical section through the air control valve; Fig. 14 is a front elevation with parts in section of a modification in which a single cable is used; and

Fig. 15 is a plan view taken from belowv with in section of Fig. 14. t

Referring now in detail to Figs. l--9 of the 'drawings, wherein for purposes of illustrating my invention one of the embodiments is shown, it will be seen that I have provided a surface treating apparatus for upright or substantially upright wall surfaces comprising a hanger means 1 in the form of an elongate channel member 2 provided with handles 3 whereby the entire apparatus may be shifted along the top of a wall W forthe treatment of successive vertical strips or hands of the wall surface.

Any suitable means may be utilized to support the hanger means 1 in spaced relation to the wall W, usually about three feet from such wall. In Figs. 1 and 2 such means takes the form of horizontally extending members 4 suitably secured to the channel member 2, upright members 5 connected to the horizontally extending members 4, such members 5 being provided at their lower ends with means 6 for engaging a rising ledge or deckplate of a building or ship, respectively, and inclined struts 7 connected to the channel 1 and vertical members 5. An angle or hook member 8 projects rearwardly of each of the vertical members 5 and is engaged witha the irregular line parts I stationary structure at the top of the wall such as the top rail or chain 9 provided on the ship S.

A movable support, preferably in the form of a housing, 10, is supported in dependent relation to the hanger means 1. The housing 10.comprises a central box member 11. and tubular members 12 and 13 extending outwardly from two opposed sides of the box 11. The tubularmembers 12 and 13 are provided with flanges 14 and 15 respectively at their inner ends through which they are secured to the box 11 by any suitable means such as bolts 16.

The outer open ends of the tubular members 12 and 13 are preferably closed by stands 17 provided with annular grooves 18 to receive such ends. Channel members 19, see Figs. 3 and 5, having closed ends 20, are provided in the outer ends of the tubular members 12 and 13 and secured thereto by means of bolts or pins 21. Bolts 22 extend through the closed ends of the channel members 19 and the stands 17 to rigidly secure the stands to the tubular members 12 and 13. Preferably the stands 17 are provided with hand grips 23 to facilitate handling of the housing 10 and its associated structure in the storing of the apparatus or the movement thereof from one job to another. The stands 17 provide a support for the housing 10 and its associated structure when the spray device to be described later is separated therefrom.

"A pair of winding drums 24 and 25 (see Fig. 4), is provided in the .box 11. Said drums 24 and 25 are suitably keyedto or otherwise secured to a shaft 26 which is rotatably mounted in suitable bearings 27.

Cables 28 and 29 are wound upon the drums 24 and 25,

respectively, the cable 28 feeding off the top of the drum 24 and the cable 29 feeding off the bottom of the drum 25, outwardly to and through the tubular members 13 and 12 respectively to and around idler pulleys 30 suitably 'mounted in the channel members 19. From the idler pulleys 30 the cables 28 and 29 are directed upwardly through suitable apertures 31 and 32 provided in the tubular members 13 and 12 respectively. At their free ends the cables 28 and 29 are provided with snap hooks '33 for engagement with eye members 34 suitably secured to the channel member 2, the cable means 28 and 29 thus functioning to suspend the housing 10 from the hanger means 1.

Tubular members 35 are preferably welded to the tubular members 12 and 13 in positions surrounding the apertures 31 and 32 and the cables 28 and 29, whereby to provide a more eifective seal against entry of deleterious materials such as paint and sand into the housing 10.

A reversible fluid motor 36 is suitably supported in the box 11, such motor having integrally connected to the shaft thereof a worm 37. The worm 37 drives a gear 38 suitably secured or keyed to a shaft 39 which is also rotatably mounted in the box 11. A pinion gear 40 is also secured to the shaft 39 and such pinion gear 40 meshes -with and drives a gear 41 suitably secured or keyed to the shaft 26. The motor 36, through the gear mechanism "just described, thus functions to lift and lower the hous- :ing 10 by winding and unwinding the cables 28 and 29 -uponthe drums 24 and 25 respectively.

A spray gun device 42 is supported by the housing 10. It is preferred that the spray device 42 be adjustably supported by the housing in order that it may be raised or lowered, or moved inwardly and outwardly rel- .ativeto said housing, as well as to be rotatably supported .for swinging movement relative to said housing. The support for the spray device 42 as shown in Fig. 4 thus preferably comprises a tubular member 43 removably secured to the bottom wall of the box 11, such tubular -member having an aperture in the bottom thereof of reduced diameter to receive an upright cylindrical mem- -ber provided with a collar 44 on its upper end and rotatably mounted in the tubular member 43. The member 45- has a horizontally extending tubular member 46 secured to its lower end and a bar 47 is slidably mounted in the member 46: At one of its ends the member 47 is provided with a radially extending flange 43 which functions as a stop member and at its other end the member 47 is provided with an eye member or sleeve 49 provided with a set screw 50. An upright member 51 is secured to the spray device 42 and slidably received in the sleeve 49 and secured therein by means of the set screw 50.

A fiuid hose 52 for paint, steam, sand and the like, is suitably connected to the spray device 42 in a manner well known in the art.

I provide a novel means for supplying fluid to the reversible motor 36 and the spray device 42, including fluid actuated means for controlling the operation of the motor, comprising a main conduit 53 provided somewhere along its length with a manually controlled valve 54 as shown in Fig. 8. The main conduit 53 branches into two conduits 55 and 56, the former of which supplies fluid to the spray device 42 and the latter of which supplies fluid to the reversible motor 36.

A valve means 57 is provided in the branch conduit 55, such valve means including a valve 58 movable to open and closed position whereby the supply of fluid to the spray device 42 may be controlled. The valve 58 comprises an elongate member provided with a reduced neck portion 59 substantially centrally thereof and a valve seat 60. The valve 58is reciprocally mounted in the valve casing 61 and is actuated to open and closed positions by means of pistons 62 and 63 secured to the opposite ends thereof for movement in cylinders 64 and 65 respectively.

The branch conduit 56 leads to a four-way valve device 66 comprising a housing 67 and a valve 68 reciprocally mounted therein for movement to two positions. The valve 68 comprises an elongate member provided with two spaced reduced neck portions 69 and 70 and four spaced valve seats 71, 72, 73 and 74. The housing 67 is provided with an inlet 75 leading to opposite sides of the housing 67 and a centrally located single exhaust opening 76. Diametrically opposite of the inlet passage 75, and on opposite sides of the valve construction longitudinally, combination inlet and outlet apertures 77 and 78 are provided. Opposite ends of the valve 68 have pistons 79 and 80 secured thereto, said pistons operating in cylinders 81 and 82 respectively to actuate the valve 68 to its two operative positions.

For a more detailed description of the valve devices 57 and 66 attention is directed to Patent No. 2,4l5,4l7 issued February 11, 1947 to Collins 'et al.

A lowering conduit 83 leads from the aperture 77 to one side of the motor 36. As will be later explained in more detail, when'fluid is supplied to the motor 36 through the conduit 83, the movable support or housing 10 will be lowered. Preferably the conduit 83 is provided with an upright portion 84 in which a valve controlled throttling means is provided, which throttling means is preferably, but not necessarily, in the form of a disk valve 85 (Figs. 6 and 7) provided with an aperture 86 and pivotally connected to the conduit 84 by means of a hinge 87. The valve 85 seats on an annular ring 86 provided in the portion 84 and if the portion 84 is upright the valve 85 will obviously be actuated to closed position by means of gravity. The flow of fluid down wardly through the portion 84 will obviously assist in maintaining the valve 85 in closed position and should the valve become stuck in open position for any reason. the flow of current downwardly through the portion 84 will also assist gravity in closing the valve.

If desired, other equivalent throttling means may be substituted for the apertured disk valve disclosed, and furthermore, it is not absolutely essential that the conduit portion 84 be upright. For example, the axis of the portion 84 might be horizontally extended with the hinge at the top, in which eventgravity would still function to actuate the valve to 'ClOS6d, pSitlOI1. Furthermore, it is pointed out that the'longitudinalaxis of the portion .84 may be positioned in any direction desired and the fluid flow through such portion be relied upon primarily or .wholly' to actuate the valve between open and closed posiv the housing 67 of the four-way valve device 66 to the other side ofthe motor 36. As will be later explained in more detail, when fluid is supplied to the motor 36 through the conduit 89, the movable support or housing 10 will be raised or lifted. e

The conduit 89 functions as an exhaust conduit when fluid is being supplied to the motor 36 through the conduit 83, and the conduit 83 functions as an exhaust conduit when fluid is being supplied to the motor through the conduit 89.

An exhaust conduit 90 leads from the common exhaust aperture 76 of the four-way valve device 66 to a casing 91 which is secured to and supported by the housing 10.

Two pilot valves 92 and 93 are supported within the casing-91. Each of the pilot valves 92 and 93 is a threeway valve device and the internal structure of one of such valves, the valve 92, is illustrated more particularly in Fig. 9. Referring to this figure, it will be seen that the valve 92 (and the valve 93 as well) comprises a housing 94 having at one end, and threadedly connected thereto, a slotted guide member 95. A rod 96 is slidably mounted in the member 95 in communication with a slot 97 provided in the guide member 95, and such rod is threadedly connected to a valve 98 comprising a central reduced neck portion 99. The valve 98-is provided with a bottom recess 100 receiving a spring 101 which normally urgesv the valvev to its uppermost position. The casing 94 is provided with a lower inlet 102, a central outlet 103 and an upper exhaust outlet to atmosphere 104. A valve actuating lever or handle 105 is pivotally connected to a bracket 105 which is suitablysecured to the casing94.

' The portion of the valve handle 105 adjacent the pivotal mounting is received in the slot 97.

The valve 93 is an exact duplicate of the valve 92 except that valve 93,is inverted in the casing and the handle or lever 105 thereof is provided with arecess 106, the wall of which recess normally bears against a pin 107 extended through the member 95. The pin 107 prevents the handle 105' from falling out of the slot 97 due to its inverted position. The handles 105 and 105 extend outwardly through vertically elongate aligned apertures 108 and 109 provided in the casing 91, and their free ends are provided with circular portions 110 and 111 provided with I apertures 112 and113 respectively.

A branch conduit 114 leads from the conduit 53 at a point in advance of the valve 54 and the conduit 114 is bifurcated to supply fluid to a conduit means generally indicated by reference numeral 115 and a second conduit means generally indicated by reference numeral 116. The conduit means 115 comprises a conduit 117 leading to the inlet 102 of the valve 92 and a conduit 118 leading from the outlet 103 of the valve 92 to conduits 119 and 120 which supply fluid to the cylinders 65 and 82 respectively.

The conduit means 116 comprises a conduit 121 leading to the inlet 102 of the pilot valve 93 and a conduit 122 leading from the outlet 103 of the valve 93 to conduits 123 and 124 which supply-fluid to the cylinders 64 andv 81 respectively.

For actuating the valves 92 and 93 I provide spaced means supported by the hanger means 1. Thus, to actuate the valve handle or lever 105 downwardly I provide a channel bracket 125 suitably secured to the channel 2, the Websfof such channel bracket being apertured to receive a tubular member 126 which depends below the wardly near its uppermost position. To actuate the handle or lever 105' upwardly, a self winding 'r eel 127 is secured to the channel member 2. The reel 127 has a cable 128 wound thereuponand'said cable is threaded downwardly through the tubularmember 126, the aper ture 112 in the handle 105 and the aperture 113 in the handle 105'. At its lower end the cable .128 is passed through a tubular stop or valve actuating member 129 and a loop 130 in the end of the cable is secured to the member 129 by means of a snap hook 131 suitably secured to suchmember. The stop member 129 may be adjustably positioned at any desired distance from the channel. member 2 in order to regulate the length of travel of the housing 10 and when the housing 10 reaches a pointnear its lowermost position the member 129er1gages the portion 111 of the handle 105 to move --the same upwardly and actuate the valve 93.

In operation, the hanger means 1' is suitably mounted along the top edge of the Wall or surface to be treated and in order to explain the operation through a complete cycle, let it be assumed that the valve 54 is closed and further that such valve had been closed at a point during the upward travel of the housing 10 just before the tubular member 126 would engage the handle 105 to actuate the valve 92.

If a painting operation is being performed, a suitable supply of paint will have been connected to the spray device 42 by means of the conduit 52 and the conduit 53 will have been connected to a supply of compressed air.

The valve 54 is then opened and compressed air will immediately be supplied through the conduit 53, the conduit 55, the valve means 66, the conduit 89, to and through the motor 36, out through the conduit 83 to the valve device 66, and from the valve device 66 through the conduit into the casing 91, and out of the casing91 through the apertures 108 and 109 to atmosphere. At this time valve 85 will be opened and maintained open due to the flow of fluid through the conduit portion 84, the valves 58 and 68 will be positioned to the right rather than to the left as illustrated in Fig. 8, the valve 59 will be closed and fluid will not be supplied through the conduit 55 to the spray device 42.

Rotation of the motor will cause the cables 28 and 29 to wind upon the drums 24 and 25 thereby lifting the housing 10 and its associated structure. Such upward movement of the housing 10 will continue and the lever will be engaged by the actuating means 126 whereby the pilot valve 92 will be actuated in the manner illustrated in Fig. 8. When the pilot valve 92 is actuated to its lowermost position against the spring101, compressed air will be supplied through the conduit 114, the pilot valve 92 and the conduits 118, 119 and to the. cylinders 65 and 82 thereby actuating the valves 58 and 68 to the positions illustrated in Fig. 8. This actuation of the valve 68 will immediately reverse the current flow through the motor so that the compressed air will be supplied to the motor through the conduit 83 and the conduit 84 and back to the other side of the valve device 66 through the conduit 89 from which valve device the air will be exhausted as previously described through the conduit 90 and the casing 91. Upon reversal of the air flow through the motor, the valve 85 of the throttling means will be actuated to closed position thereby throttling the fluid flowing therethrough to the motor so that the main portion of the supply of fluid will pass through the now open valve 58 to the spray device 42. The reposition in which position fluid supply to the valve through the inlet 102 is prevented and fluid in the conduit means 115 is exhausted to atmosphere through the exhaust 104. The valves 58 and 68, however, being supported by the housing with their axes substantially horizontal, will remain in the positions illustrated in Fig. 8 until actuated to their opposite positions as will be presently described.

The lowering of the housing and the surface treating operation continues until the valve actuating lever 105' is engaged by the stop member or valve actuating member 129 and is moved upwardly thereby to actuate the pilot valve 93. Upon actuation of the pilot valve 93 fluid is supplied from the main conduit 53 through the conduits 114, 121, 122, 123 and 124 to the cylinders 64 and 81 whereupon the valves 58 and 68 are actuated to the right as viewed in Fig. 8. Actuation of the valve 58 to the right cuts off the supply of fluid to the spray device 42 and the movement of the valve 68 to the right causes another reversal of the flow of fluid to the motor. fluid is now supplied to the motor through the conduit 89 and exhausted therefrom through the conduits 84, 83 and 90, and the casing 91 as previously described, and the housing 10 is now lifted by means of the drums 24 and 25 winding up the cables 28 and 29 thereon. The full supply of fluid is now being supplied to the motor 36 in order to supply the additional force required to lift the housing 10 and its associated structure and the valve 85 of the throttling means will now be opened due to the flow of fluid upwardly through the conduit portion 84.

As the housing 10 is lifted, the valve actuating handle 105' will be returned to its normal position by means of the spring 101 and fluid from the conduit means 116 will be exhausted to atmosphere through the port 104. Again,

however, the valves 58 and 68 will remain in their right hand positions as viewed in Fig. 8 until such valves are again actuated upon actuation of the pilot valve 92.

As the housing 10 reaches the upper limit of its travel, and preferably before the lever 105 is engaged by the actuating means 126, the manually controlled valve 54 is closed to stop operation of the apparatus. The hanger means 1 is then moved to a new position for the treatment of an adjacent strip or area of wall surface and the operation referred to above is repeated.

It will be obvious from the foregoing description, that with the exception of the pilot valves 92 and 93, all of the movable working parts of the apparatus are suitably enclosed and protected against the admission of deleterious materials, such as paint, sand, and the like, which materials might soon render any movable parts inoperative.

Since it is impossible to so locate the valves 92 and 93 together with their actuating means, the exhaust from the motor is herein utilized to create a pressure above atmospheric within the casing 91, and the fluid is exhausted to atmosphere from such casing through the aperturcs 108 and 109 which are necessary to permit actuation of the valve operating handles. By this means the pilot valves 92 and 93 are very effectively prevented from contact with deleterious materials.

Referring now to the construction shown in Figs. 10 to 13, inclusive, the construction there illustrated comprises the hanger and cable arrangement as previously described along with the reel 127 and stops 126 and 129 at opposite ends of the control cable 128.

The spray 155 in this embodiment is mounted at the top of casing 172 and projects inwardly through a collapsible shield, the collapsing portions of which are mounted on a rectangular box. The rectangular box comprises a vertical base portion 135, upper flange 136, lower flange 138 and end flanges 137 and 139.

Vertically pivoted end members 141 and 142 are hinged to the end flanges 137 and 139 respectively. The upper panel 140 is hinged to the upper flange 136, and the lower spacer supporting panel 143 is hinged to the lower box flange 138. When it is desired to collapse the The box so as to make it less diflicult to ship the entire device, the wing nuts are removed (see Fig. 10) and the upper panel is moved upwardly, thus releasing the top edges of the end panels 141 and 142. After this the lower panel 143 is moved downwardly along with the spacer assembly and then end panels 141 and 142 may be moved inwardly. It will be noted that I have provided a flange 144 shown in Figs. 10 and 12 and a flange 145 shown in Fig. 10 adapted to contact the end panels 142 and 141 when it is desired to operate the device. These flanges as well as flanges 146 and 147 may be secured to the end panels in any desired manner, wing nuts being shown.

In order to space the spray at a proper distance from the surfaces to be covered or treated I have provided an upper arm 148 which is centrally located with respect to the entire device and upon which the wheel is mounted and adapted to contact the before-mentioned surfaces. Lower arms 150 and 152 are mounted upon the panel 143 and are provided with wheels 151 and 153. The construction immediately described above results in a three point suspension and maintains the entire device in a steady condition as the spray or other surface treating member descends.

It is often necessary to adjust the spray gun to arcs of greatly varying degrees in order to get under ladders, around pipes running up the wall and in angular surfaces caused by corners. When this condition is encountered, the spray gun may be mounted on the vertical rod 134 shown at the lower part of Fig. 10. This arm is adjustably received in a socket and mounted on the end of extension rod 132 and the rod is maintained in desired position by means of set screw 133. A similar extension arm (not shown) is mounted at the opposite end of the device.

In this embodiment of the invention a simplified valve of the plural way type is used, this being shown in detail in Fig. 13. The winding drum operates in exactly the same manner as previously described in connection with Fig. 3.

A main air conduit 162 enters one side of the valve casing 159 and compressed air when the valve is in the position shown in Fig. 13 passes from the main conduit through the short nipple 158 and then to the T-fitting 157. The air then goes to the sprayer through conduit 156 and goes to one side of the motor through conduit 160 to lower the device. The valve as shown in Fig. 13 represents a position of the spray assembly when it is at the top of its travel and just after the handle 163 which is pivoted to the clevis 164 has contacted the stop member 126 shown at the top of Fig. 10. At this position the valve is all the way up and in the next position the handle 163 is pulled upwardly so that the barrel 168 is received between the valve seats 169 and 170, thus cutting off communication from the main air inlet 162. This is what is known as the neutral position and neither the motor nor the sprayer are energized so that in this position nothing occurs. As the handle 163 is pulled further upwardly this motion is transmitted to the clevis 165, thus pushing the valve down further so that the barrel portion 166 contacts the valve seat 167 and the barrel 168 closes the valve seat 170 but opens the port formed by the valve seat 169. In this position air is admitted to the raising conduit which causes the entire device to travel upwardly. When it has reached the limit of its upward travel stop member 126 causes the valve 168 to assume a neutral position. After this the handle 163 may be actuated manually or the cable 128 may be grasped to cause the stop member to engage the handle 163 which in turn causes the barrel 168 to descend and admits air to the raising conduit.

During the time that the barrel 168 is in neutral position the device may be shifted from the vertical sector which has been treated to an untreated portion of the Wall and the cycle is repeated of admitting air through the valve 168 as shown in Fig. 13. In this case, air passes through the'spraye'r and the lowering conduit and as the entire assembly descends the sprayer is actuated and'the motor, of course, is actuated to cause such descending.

It'should be stated that the' previously described embodiment involves two valves, 57 and'66, along with-the pilot valves 92 and-93. In the present embodiment shown in Fig. 13'only one valve is necessary and since this is connected in exactly the same way to the air motor it is notbelieved'necessary to further illustrate the same. It should be' noted that the conduit 160 of Fig. 13 corresponds to the conduit'83 of Fig. 8' and that the conduit 161 of Fig. 13 coresponds to the conduit 89 in'Fig. 8 and further that the conduit 156 of Fig. 13 corresponds to the conduit 55 of Fig. 8.

Referring now to the modification shown in Figs. 14 and'l5 the construction in this case is much more compact than in" either of the two'previously described embodiments and differs therefrom'in that a single cable is employed; This results in a surface treating device which is much' less expensive to manufacture and one with fewer parts'and one with less upkeep.

The sarn'e'fluid motor 36 is used as shown in Fig. 3 and'this is contained in the housing- 197. The motor shaft is'providedwith a pinion 37 which meshes with the gear 180 fixed'to'the shaft 186. The shaft 186'is received in bearings oppositely disposed in the winding drum housing 196'. The cable 183 is secured to the shaft-186and'winds and unwinds thereabout. The cable drum may beformed of twodiscs 182 and 184 secured to the shaft 186 or may comprise a sleeve secured to the discs 182 and 184 which the valve housing 189 the extension arms 47 are mounted" which are exactly the same as the extension arms shown in Fig. 4 and described hereinbefore. Thus it will be seen that a clamp type spray can be mounted on the shaft '51 or if a gun type is to be used shaft 47 is rotated and the holster 154 is employed.

The valve 159 is exactly the same as the valve bearing the same reference numeral shown in detail in Fig. 13, and no further illustration thereof is deemed necessary.

This valve is provided with actuating handle 163 which has an aperture through which a control cable 200 is threaded. This cable is provided with removable stop clips 198 and 199 for a purpose to be described hereinafter and is threaded as follows; beneath the pulley 201, over pulley 202, under pulley 203, over pulley 204, and terminates in the cable ring 205.

The raising and'lowering cable 183 extends upwardly from the drum and has attached thereto a dog 193 which is adjustably mounted on the cable at a position where it is desired to stop the upward travel of the surface treating device.

At' the'upper end of the cable 183 a snap link 194 secures'the same to a trolley assembly generally indicated at 195. This permits the device to be readily moved from one portion of the wall surface to another, and increases the speed of operation. Inoperation the plural-way valve 159 enclosed inthe housing 189 is actuated so that the exhaust from the valve 159 plays upon the opening through which the handle 163 extends as described heretofore in connection with Fig. 13. Another exhaust conduit is provided so as to have its exit end immediately adjacent the opening inthe upper panel of the drum housing 196 through which the cable 183 extends. This constant exhaust' of air while the treating device is either ascending or descending blows all foreign matter away from the handle 163 and away from the cable 183 and-also prevents of fluid is utilized in the motor.

10 admission of dirt and other undesirable'foreign" matter fr'omente'ring the housings 189 arid'196.

The'cable 200 has removable stop button 199 secured thereto at a predetermined distance so that a vertical reach of a desired depth may be covered by the device whereupon the 'valve 159 will be actuated. For example, the cable 200 is secured either to the channel upon which the trolley 195 is mounted orotherwi'se and then if fifty feet is desired to be treated the stop button 199 is secured at a distance of fifty feet from the'top of the cable 200. When the device has traveled-downwardly a distance of fifty feet the valve handle 163'is tripped upwardly and the valve will be forced downwardly to a' reverse position from that shown'in Fig. 13 which will cause the device to start moving upwardly. The operator then closes the main air line 162 to the valve 159 and'the device is moved by means of the trolley 195 to the new vertical panel which is to be treated. The air is then turned on and all of this air passes through. the raising conduit 161 to the air motor 36, causing the device totravel'upw'ardly.

When the device has reached the position shown in Fig. 14 which is the upper limit of travel, the cable ring 205 is forced against the cable dog 193 and due to the provision of the'stop button 198 a strain is placed on the control cable 200. As the device rises the'strain is increased which causes the stop button 198 to mov'ethe handle 163 downwardly where the parts of the valve 159 assume the position shown in Fig. 13. The device is now ready to spray or otherwise treat the wall surface, and it starts its downward travel where the cycle is again repeated when'it reaches the predetermined length of the control cable 200.

In order to balance the surface treating device a bracket 192 has been provided'upon which vertical plates are mounted fore and aft, one of these, 206, being shown in Fig. 14. Pulleys and 191 are mounted on horizontal shafts journaled in such plates. The pulleys 190 and 191 mesh with the cable 193 therebetween andif for any reason the treating device'moves from a horizontal plane, then cable 183 gains support from either one of the pulleys 190 or 191, causing the deviceto right itself and to again assume a true horizontal position. i

This embodiment of the treating device may also be provided with the shield shown in Figs; 10, 11, and 12, but it is not deemed necessary to again show the" shield.

Normally the spray unit K or other treating element is mounted centrally on the upper panel 208 of the drum housing 196 but where it is desired to reach otherwise inaccessible places the spray gun may be mounted on extension arms at either side of the lower end of the housing.

It will be obvious, of course, that fluid other than compressed air, such as steam or other treating fluid, for example, could be utilized in' the operation of my apparatus, depending upon the particular treating operation. For a steam treating operation it will be obvious, of course, that steam should be used instead of compressed air.

It will be obvious from the foregoing that with my improved apparatus I am able to efficiently utilize a single common source of compressed fluid, in that while the spray device is being lowered and the spraying operation is being performed, only a small amount of fluid is being supplied to the'motor which isoperating to lower the apparatus. This is possible, of course, because gravity assists in the lowering operation. During the lifting operation when more power is required, the entire supply This diversion of the common supply of fluid is, of course, automatically taken care of by the particular valve constructions specifically described above.

As indicated hereinbefore, this apparatus, while primarily designed for painting, may be utilized for other surface treating operations such as sandblasting, steam cleaning or the like, and in fact any surface treating op- 1 1 eration involving the use of a gaseous fluid, either as the treating material itself, or as a carrier for such material.

In general, the conduits may be made of flexible material, and in one form of the apparatus which I have constructed, the conduit 53 has an internal diameter of approximately one-half inch, all other conduits having an internal diameter of one-fourth inch, and the aperture 86 in the valve 85 has a diameter of inch. With this construction, and a main fluid supply in the conduit 53 of 80 pounds per square inch, when the valve 85 is in its closed or operative position, fluid having a pressure of approximately twenty pounds per square inch is supplied to the motor 36, and fluid having a pressure of approximately sixty pounds per square inch is supplied to the spray gun 42. The dimensions and pressures referred to are given merely by way of illustration and not in limitation of the invention.

By using a special wide nozzle in the spray gun 42, I am able to treat a strip of wall surface approximately seven feet wide with the spray gun positioned approximately three feet from such surface.

The apparatus is simple is construction, safe in operation, even in compartments containing explosive mixtures of gases, and except for having to be shifted from time to time for action upon new areas of the surface being treated, the first embodiment is automatic in operation, all embodiments are economical in use of the medium employed in the treatment, are light in weight so that they may be easily set up and readily maneuvered in shifting from one field of operation to another, and dispense with the use of ladders, scaffolding and other intricate and expensive supporting structures involving high labor costs for erection and maintenance.

The employment of a single cable results in lower costs for maintenance as well as the original cost. Furthermore. the single cable device is very compact and light in weight so that it can easily be handled.

The collapsible shield restricts the treating medium to the wall surface, thus preventing damage to other areas and articles such as parked automobiles and is highly advantageous on windy days.

The spacing wheel assembly retains the device at the desired distance from the wall being treated and if desired the rods upon which the wheels are mounted may be provided with hinges to further collapse the entire device into a more compact mass.

The collapsible shield shown in Figs. 10, 11, and 12 may be employed with or without the various types of lifting devices and also may be used without the exact paint valves disclosed. On the other hand, the valving arrangement may be separated from the spray shield and employed therewith by means of flexible conduits. For example, the valving device could be located on the ground, on the roof of a tank, or on the deck of a ship. If this is done, then the wing nuts 220 and 221 as shown in Fig. 12 are removed and the shield is withdrawn over the tube 155. Straps may then be attached to the eyebolts 210 and 211 much in the manner of the connection between cables 28 and 29 and eye-bolts 34. The shield can then be lifted at will and is particularly useful in treating large vertical surfaces such as moving picture screens.

Spray gun mounting attachments such as the unit K shown in Fig. 14 may be bolted to the vertical panel 135 or if desired it may be secured to the interior surfaces of any of the horizontal or end panels. In the same manner the adjustable spray gun mount 47 shown at the lower right hand portion of Fig. 15 may be secured to an outer surface of any one of the panels including the upper and lower flanges 136 and 138.

In order to readily assemble and disassemble the collapsible shield, wing nuts 212 and 213 are adapted to be threaded upon bolts extending through end panel 142 and flange 147. In the same manner flange 144 is secured to the end panel 142 by means of the wing nuts 218 and 12 219. At the other end the panel 141 is secured by means of the wing nuts 214, 215, and another wing nut not shown.

The shield when collapsed is very compact, thus decreasing the cost of shipping, but, at the same time, when opened up with its panels secured together, it extends over a considerable distance effectively preventing the spray from contacting areas which it it not desired to treat.

It will be obvious that modifications may be made by those skilled in the art without departing from the spirit of the invention, and it is my desire to cover all such modifications as come within the scope of the invention.

I claim:

1. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of a Wall, a housing, winding drum means secured to said housing including cable means suspending said housing from said hanger means, a reversible gaseous fluid motor in said housing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device supported by said housing, a main conduit for gaseous fluid, a branch conduit leading from said main conduit to said spray device, a valve in said branch conduit movable to open and closed positions, a four-way valve device, a second branch conduit leading from said main conduit to said four-way valve device, a conduit leading from one side of said four-way valve device to one side of said motor, said motor being rotated in a direction to unwind said cable and lower said housing when fluid is supplied thereto through said last conduit, said last conduit including an upright portion having a pivoted apertured valve therein actuated to and maintained in operative position by gravity and actuated to and maintained in inoperative position by gaseous fluid flowing upwardly in said portion, a conduit leading from the other side of said four-way valve device to the other side of said motor, said four-way valve device including a valve movable to two positions reversing the direction of gaseous fluid flow through said last two conduits and said motor, means including fluid pressure means for actuating said first and four-way valves from one position to the other simultaneously comprising two conduit means, a pilot valve in each of said two conduit means controlling the supply of gaseous fluid to said fluid pressure means, a casing supported by said housing and enclosing said pilot valves, vertically extending elongate aperture means in said casing, an actuating handle on each of said pilot valves in spaced vertical alignment and projecting outwardly through said aperture means in said casing, an exhaust conduit leading from said four-way valve device to said casing, whereby fluid exhausting from said motor is discharged into said casing and exhausts to atmosphere through said aperture means, an opening in each handle outwardly of said casing in vertical alignment with each other, a reel carrying a cable supported by said hanger means, said cable extending through said openings and having means thereon for engaging the lower handle to actuate the pilot valve associated therewith to in turn actuate said first recited valve and said four-way valve to positions whereby the gaseous fluid supply to said spray device is cut off and the direction of rotation of said motor is reversed to lift said housing, respectively, and means supported by said hanger means for engaging the upper handle to actuate the pilot valve associated therewith to in turn actuate said first-recited valve and said four-way valve to positions whereby gaseous fluid is supplied to said spray device and the direction of rotation of said motor is reversed to lower said housing.

2. In surface treating apparatus for upright wall surfaces, a housing, winding drum means secured to said housing including cable means for suspending said housing from hanger means, a reversible gaseous fluid motor in said hosuing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device supported by said housing, a main conduit for gaseous fluid, a branch conduitleadin'g' from said main'conduit to said spray device, a valve in's'aid branch conduit movable to open and closed positions, a four-way valve device, a second branch conduit leading from said main conduit to said four-way valve device, a conduit leading from one side of said tourway valve device to one side of said motor, said motor being rotated in a direction to unwind said cable andlower said housing when fluid is supplied thereto through saidlast conduit, said last conduit including a portion having a throttling means therein including a valve movable to operative and inoperative positions, a conduit leading from the other side of said four-way valve device to the other side of said motor, said four-way valve device including a valve movable to two positions reversing the direction of gaseous fluid flow through said last two conduits and said motor, means for actuating said first and four-way valves from one position to the other', a casing supported by said housing and enclosing said'valve actuating means, aperture means in said casing, lever means controlling said actuating means projecting outwardly through said aperture means in said casing, an exhaust conduit leading from said four-way valve device to said casing, whereby fluid exhausting from said motor is discharged into said casing and exhausts to atmosphere through said aperture means, and means for actuating said lever means to in turn actuate said first recited valve and said four-way valve device whereby the gaseous fluid supply of saidspray device is controlled and the direction of rotation of said motor is reversed, respectively.

3. In surface treating apparatus for upright wall surfaces, a movable support, means for lowering and lifting said support including a reversible fluid motor, a spray device carried by said support, a main conduit for gaseous fluid, a branch conduit leading from said main conduit to said spray' device, a valve in said branch conduit movable to open and closed positions to control the supply of fluid to said spray device, branch conduit means leading from said main conduit including two conduits leading to opposite sides of said motor,-valve means including fluid exhaust means controlling the flow of fluid through said two conduits to said motor, wherebyv the direction of rotation of said motor may be reversed, said motor being rotated in a direction to'lower said support when fluid is supplied thereto through one of said two conduits, said one of said two conduits including a portion having a throttling means therein including a valve movable to operative and inoperative positions, said first valve being open when fluid is supplied to said motor through said one of said two conduits and being closed when fluid is supplied to said motor through the other of said two conduits.

4. In surface treating apparatus for upright wall surfaces, a housing, means for lowering and lifting saidhous ing including a reversible gaseous fluid motor in said housing, a spray device supported by said housing, a main conduit for gaseous fluid, a branch conduit leading from said main conduit to said spray device, a valve in said branch conduit movable to open and closed positions to' control the supply of fluid to said spray device, branch conduit means leading from said main conduit including two conduits leading to opposite sides of said motor, valve means including fluid exhaust means controlling the flow of fluid through said two conduits to said motor, whereby the direction of rotation of said motor may be reversed, means including lever means for actuating said valve means, a casing supported'by said housing and enclosing said last means, aperture means in said casing,

said lever means projecting outwardly through said apertiire means, said fluid exhaust means including a conduit leading to said casing, wherebyfluid exhausting from said motor is discharged into said casing and exhausts to atmosphere through said aperture means.

5. In'surface treating apparatus for upright wall'surfaces, a hanger means shiftable along the top of a'wali, a housing, roller means carried by said housing and engageable with said wall, winding drum means secured to said housing including cable means suspending said housing from said hanger means, a reversible gaseous fluid motor in said housing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device supported by said housing, a'plural way valve device including fluid exhaust means, a main conduit for gaseous fluid leading to said plural-way valve device, a second conduit leading from one side of said valve device to one side of said motor, a branch conduit connected to and leading from said second conduit to said spray device, said motor being rotated'in a direction to unwind said cable and lower said housing when fluid is supplied thereto through said second conduit, said second conduit including an upright portion between said branch conduit connection and said motor, said upright portion having a pivoted apertured valve therein actuated to and'maintained in operative position by gravity and gaseous fluid flowing downwardly through said portion and actuated to and maintained in inoperative position by gaseous fluid flowing upwardly in said portion, a conduit leading from the-other side ofsaid plural-way valve device to the other side of said motor, said plural-wayvalve device including a valve movable to positions reversing the direction of gaseous fiuidflow through said motor and said conduits leading to said motor, means for actuating said'plural-way valve including a handle, an opening in said handle, a cable supported by said hanger means, said cable extending through said opening and having stop means thereon adjacent the bottom thereof for engaging the handle to'actuate said plural-way valve to a position whereby the gaseous fluid supply to said spray device and said motor is cut off, means for actuating said cable manually to move the handle of said plural-way valve to reverse the direction of fluid flow through said conduits leading to said'm'otor whereby the direction of rotation of said motor is reversed to'liit said housing and means supported by said hanger means for engaging said handle to actuate said pluralway valve to a position whereby the gaseous fluid supply to said motor is cut off, said handle being movable to a position whereby gaseous fluid is supplied to said spray device and the direction of rotation of said motor is reversed to lower said'housing.

6. In' surface treating apparatus for upright wall surfaces, ahanger means shiftable along the top of a wall, a housing, roll'er means carried by said housing and engageable with said wall, winding drum means secured to said housing including cable means suspending said housing from said hanger means, a reversible gaseous fluid motor in said housing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device supported by said housing, a plural-way valve device including fluid exhaust means, a main conduit for gaseous fluid leading tosaid plural-way valve device, a second conduit leading from one side of said valve device to one side of said motor, a branch conduit connected to and leading from said second conduit to said spray device, said motor being rotated in a direction to unwind said cable and lower said housing when fluid is supplied thereto through said second conduit, said second conduit including a portion between said branch conduit connection and said motor, said portion'having a pivoted apertured valve therein actuated to and maintained in operative position by gaseous'fluid flowing through said portion to said motor and actuated to and maintained in inoperative position by gaseous fluid'flowing in said portion from said motor, a

.conduit leading from the other side of said plural-way valve device to the other side of said motor, said pluralway valve device including-a valve movable to positions reversingthe direction of gaseous fluid flow through said motor and said conduits leading to said motor, means for actuating said plural-way valve including a handle, an opening in said handle, a cable supported by said hanger means, said cable extending through said opening and having means thereon adjacent the bottom thereof for engaging the handle to actuate said plural-way valve to a position whereby the gaseous fluid supply to said spray device and said motor is cut off, means to actuate said handle manually to reverse the direction of fluid flow through said conduits leading to said motor whereby the direction of rotation of said motor is reversed to lift said housing, and means supported by said hanger means for engaging said handle to actuate said plural-Way valve to a position whereby the gaseous fluid supply to said motor is cut off, said handle being movable to a position whereby gaseous fluid is supplied to said spray device and the direction of rotation of said motor is reversed to lower said housing.

7. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of a wall, a housing, winding drum means secured to said housing including cable means suspending said housing from said hanger means, a reversible gaseous fluid motor in said housing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device supported by said housing, a pluralway valve device including fluid exhaust means, a main conduit for gaseous fluid leading to said plural-way valve device, a second conduit leading from one side of said valve device to one side of said motor, a branch conduit connected to and leading from said second conduit to said spray device, said motor being rotated in a direction to unwind said cable and lower said housing when fluid is supplied thereto through said second conduit, said second conduit including a portion between said branch conduit connection and said motor having a throttling means therein including a valve movable to operative and inoperative positions, a conduit leading from the other side of said plural-way valve device to the other side of said motor, said plural-way valve device including a valve movable to positions reversing the direction of gaseous fluid flow through said motor and said conduits leading to said motor, means for actuating said plural-way valve including a handle, an opening in said handle, a cable supported by said hanger means, said cable extending through said opening and having means thereon adjacent the bottom thereof for engaging the handle to actuate said plural-way valve to a position whereby the gaseous fluid supply to said spray device is cut ofli, and the direction of fluid flow through said conduits leading to said motor is reversed whereby the direction of rotation of said motor is reversed to lift said housing, and means supported by said hanger means for engaging said handle to actuate said plural-way valve to a position whereby gaseous fluid is supplied to said spray device and the direction of rotation of said motor is reversed to lower said housing.

8. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said Wall, a housing, winding drum means secured to said housing including cable means suspending said housing from said hanger means, a reversible gaseous fluid motor in said housing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device supported by said housing, valve means, a main conduit for gaseous fluid leading to said valve means, a second conduit leading from said valve means to one side of said motor, a branch conduit connccted to and leading from said second conduit to said spray device, said motor being rotated in a direction to unwind said cable and lower said housing when fluid is supplied thereto through said second conduit, said second conduit including a portion between said branch conduit connection and said motor having throttling means therein including a valve movable to operative and inoperative positions, and a conduit leading from said valve means to the other side of said motor, said motor being rotated in a direction to wind said cable and lift said housing when fluid is supplied thereto through said last conduit, said valve means including means movable to positions reversing the direction of gaseous fluid flow through said motor whereby the direction of rotation of said motor may be reversed.

9. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said wall, a movable support, winding drum means secured to said support including cable means suspending said support from said hanger means, a reversible fluid motor carried by said support, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device carried by said support, valve means, a main conduit for gaseous fluid leading to said valve means, a second conduit leading from said valve means to one side of said motor, a branch conduit connected to and leading from said second conduit to said spray device, said motor being rotated in a direction to unwind said cable and lower said housing when fluid is supplied thereto through said second conduit, said second conduit including a portion between said branch conduit connection and said motor having throttling means therein including a valve movable to operative and inoperative positions, and a conduit leading from said valve means to the other side of said motor, said motor being rotated in a direction to wind said cable and lift said housing when fluid is supplied thereto through said last conduit, said valve means including means movable to positions reversing the direction of gaseous fluid flow through said motor whereby the direction of rotation of said motor may be reversed, and means for actuating such movable means.

10. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said Wall, a movable housing, winding drum means secured to said housing including cable means suspending said housing from said hanger means, a reversible fluid motor in said housing, means drivingly connecting said motor to said winding drum means for lowering and lifting said housing, a spray device carried by said housing, a main conduit for fluid, conduit means leading from said main conduit to one side of said motor and to said spray device, said motor rotating in a direction to unwind said cable means and lower said housing when fluid is supplied thereto through said conduit means, conduit means leading from said main conduit to the opposite side of said motor, said motor rotating in a direction to wind up said cable means and lift said housing when fluid is supplied thereto through said last conduit means, valve means controlling the flow of fluid through said conduit means, whereby the direction of rotation of said motor may be reversed, said first conduit means including a portion leading to said motor only, a throttling means comprising a pivoted apertured valve in said portion movable to operative and inoperative positions, a casing supported by said housing and enclosing said valve means, elongate aperture means in said casing, said valve means including an actuating handle projecting outwardly through said aperture means in said casing, and means discharging fluid exhausting from said motor into said casing for exahust to atmosphere through said aperture means.

11. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said wall, a movable support, winding drum means secured to said support including cable means suspending said support from said hanger means, a reversible fluid motor carried by said support, means drivingly connecting said motor to said winding drum means for lowering and lifting said support, a spray device carried by said support, a main conduit for fluid, conduit means leading from said main conduit including two conduits leading to opposite sides of said motor and a conduit communicating with one of said two conduits and leading to said spray device, valve said motor may be reversed, said motor being rotated in a direction to unwind said cable and lower said housing when'fluid is supplied thereto through said one of said two conduits, and said one of said two conduits including a portion between the point of communication therewith of said conduit leading to said spray device and said motor having a throttling means therein including a valve movable to operative and inoperative positions, said last recited valve being positioned in operative position when fluid is supplied to said motor through said one of said conduits whereby a substantial portion of the main fluid supply is diverted through said conduit communicating with said one of said two conduits and leading to said spray device.

12. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said wall, a movable support, winding drum means secured to said support including cable means suspending said support from said hanger means, a reversible fluid motor carried by said support, means drivingly connecting said motor to said winding drum means for lowering and lifting said support, a spray device carried by said support, a main conduit for fluid, conduit means leading from said main conduit to one side of said motor and to said spray device,

said motor rotating in a direction to unwind said cable means and lower said support when fluid is supplied thereto through said conduit means, conduit means leading from said main conduit to the opposite side of said motor, said motor rotating in a direction to wind up said cable means and lift said support when fluid is supplied thereto through said last conduit means, valve means controlling the flow of fluid through said conduit means, whereby the direction of rotation of said motor may be reversed, said first conduit means including an upright portion leading to said motor only, and a pivoted apertured valve in said upright portion actuated to and maintained in operative position by gravity and actuated to and maintained in inoperative position by fluid flowing upwardly through said portion.

13. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said wall, a movable support, winding drum means secured to said support including cable means suspending said support from said hanger means, a reversible fluid motor carried by said support, means drivingly connecting said motor to said winding drum means for lowering and lifting said support, a spray device carried by said support, a collapsible shield surrounding said spray device, a main conduit for fluid, conduit means leading from said main conduit to one side of said motor and to said spray device, said motor rotating in a direction to unwind said cable means and lower said support when fluid is supplied thereto through said conduit means, conduit means leading from said main conduit to the opposite side of said motor, said motor rotating in a direction to wind up said cable means and lift said support when fluid is supplied thereto through said last conduit means, valve means controlling the flow of fluid through said conduit means, whereby the direction of rotation of said motor may be reversed, said first conduit means including a portion leading to said motor only, and a pivoted apertured valve in said portion actuated to and maintained in operative position by fluid flowing downwardly through said portion and actuated to and maintained in inoperative position by fluid flowing upwardly through said portion.

14. In surface treating apparatus for upright wall surfaces, a hanger means shiftable along the top of said wall, a movable support, winding drum means secured to said support including a cable suspending said support from said hanger means, a reversible fluid motor carried by said support, means drivingly connecting said motor to said winding drum means for lowering and lifting said support, a spray device carried by said support, a main conduit for fluid, conduit means leading from said main conduit to one side of said motor and to said spray device, said motor rotating in a direction to unwind said cable means andlower said support when fluid is supplied thereto through said conduit means, conduit means leading from said main conduit to the opposite side of said motor, said motor rotating in a direction to wind up said'cable .means andlift said support when fluid is supplied thereto through said last conduit means, valve means controlling the flow of fluid through said conduit means, whereby the direction of rotation of said motor may be reversed.

15. In surface treating apparatus for upright wall surfaces, a movable support, means for lowering and lifting said support including a reversible fluid motor on said support, a spray device carried by said support, a main conduit for gaseous fluid, and conduit means communicating with said main conduit for supplying fluid to said motor and said spray device, valve means controlling the supply of fluid from said main conduit to' said conduit means, and a throttling valve means movable to operative and inoperative positions in said conduit means apportioning the main supply of fluid to said motor and said spray device.

16. In surface treating apparatus for upright Wall surfaces, a movable support, means for lowering and lifting said support vertically including a reversible fluid motor on said support, a spray device carried by said support, a main conduit for gaseous fluid, and a single valve means connected to one end of said main conduit for supplying fluid to said motor and said spray device, said main conduit being connected at its other end to a source of fluid supply and a spray fluid line connected at one end of said spray device and at the other end to a source of spray fluid supply.

17. The structure defined in claim 16 including a collapsible shield carried by said support and surrounding said spray device.

18. In surface treating apparatus for upright Wall surfaces, a housing, a spray, said housing being supported solely by a single cable for lowering and lifting said housing, said cable having one end thereof connected to a winding drum in said housing, a reversible fluid motor in said housing carried by said housing for rotating said drum and a single valve means to actuate said spray and said motor.

19. The structure defined in claim 18 wherein said housing has secured thereto a plurality of extensible arms with means on said arms adapted to receive a sprayer.

20. The structure set forth in claim 18 wherein said housing has mounted thereon a bracket and pulleys on said bracket, said cable passing between said pulleys, said pulleys being located above said housing.

21. The structure set forth in claim 18 wherein the other end of said cable is connected to a trolley support, located at the upper end of the cable.

22. In surface treating apparatus for upright wall surfaces, a housing, said housing being suported solely by a single cable for lowering and lifting said housing, said cable having one end thereof connected to a winding drum in said housing, a reversible fluid motor in said housing for rotating said drum and valve means to actuate said motor, said valve means having an operating handle controlling the same, a control cable secured to said handle terminating in a cable ring surrounding said first-named cable and a stop dog on said first-named cable.

23. In surface treating apparatus for upright wall surfaces, a housing supported solely by a single cable, a winding drum in said housing, a reversible fluid motor in said housing for rotating said drum and a single valve means to actuate said motor and a spray gun, said cable having one end connected to said drum and the other end connected to a point above said housing, a spray shield, a spray gun mounted on said shield, a flexible conduit gun.

References Cited in the file of this patent UNITED STATES PATENTS Paasche July 29, 1924 Glaze May 25, 1937 20 Papazian Mar. 28, 1939 Teodonno Aug. 27, 1940 Madison Jan. 16, 1945 Crom Mar. 6, 1945 Hirsch July 19, 1949 Chappen Mar. 14, 1950 Goetchius May 23, 1950 

